1.2.4 Functions

Global Functions

Origin C provides many global functionsFunctions, Predefined for performing a variety of tasks. These global functions fall into twenty-six categories.

1. Basic IO
2. Character and String Manipulation
3. COM
4. Communications
5. Curve
6. Data Conversion
7. Data Range
8. Date Time
9. File IO
10. File Management
11. Fitting
12. Image Processing
13. Import Export
14. Internal Origin Objects
15. LabTalk Interface
16. Math Functions
17. Mathematics
18. Matrix Conversion and Gridding
19. Memory Management
20. NAG
21. Signal Processing
22. Spectroscopy
23. Statistics
24. System
25. Tree
26. User Interface

Please refer to the Global Functions section for a complete list of functions with examples.

User-Defined Functions

Origin C supports user-defined functionsFunctions, User-defined. A user-defined function allows Origin C programmers to create functions that accept their choice of arguments and return type. Their function will then operate on those arguments to achieve their purpose.

The following creates a function named my_function that returns a double value and accepts a double value as its only argument.

double my_function(double dData)
{
	dData += 10;
	return dData;
}

The following code snippet shows how to call the above function.

double d = 3.3;         // Declare 'd' as a double value
d = my_function(d);     // Call the above function
out_double("d == ", d); // Output new value of 'd'

Origin C functions can also be called from LabTalk.

d = 3.3;            // Assign 3.3 to 'd'
d = my_function(d); // Call the above function
d=;                 // Output new value of 'd'